void* MyMemcpy(void* dest,const void* src,int n)
{
    char* pDest=(char*)dest;
    char* pSrc=(char*)src;
    for(int i=0;i<n;i++)
    {
        *(pDest+i)=*(pSrc+i);
    }
    return dest;
}

void qsort(void* base,int nelem,unsigned int width,
           int (*pfCompare)(const void*,const void*));
